// Legacy API handler for Blender and other direct requests
add_action('init', function() {
    if (!isset($_GET['glm_action'])) return;
    $action = sanitize_text_field($_GET['glm_action']);
    $license_key = isset($_GET['license_key']) ? sanitize_text_field($_GET['license_key']) : '';
    $secret_key = isset($_GET['secret_key']) ? sanitize_text_field($_GET['secret_key']) : '';
    $product_ref = isset($_GET['product_ref']) ? sanitize_text_field($_GET['product_ref']) : '';
    $registered_domain = isset($_GET['registered_domain']) ? sanitize_text_field($_GET['registered_domain']) : '';
    $result = null;
    $request = new WP_REST_Request('GET', '/');
    $request->set_param('license_key', $license_key);
    $request->set_param('secret_key', $secret_key);
    $request->set_param('product_ref', $product_ref);
    $request->set_param('domain', $registered_domain);
    $request->set_param('uuid', $registered_domain); // for compatibility
    $request->set_param('glm_action', $action);
    if ($action === 'glm_check') {
        $result = GLM_API::check_license($request);
    } elseif ($action === 'glm_activate') {
        $result = GLM_API::activate_license($request);
    } elseif ($action === 'glm_deactivate') {
        $result = GLM_API::deactivate_license($request);
    } else {
        $result = ['success' => false, 'error' => 'Unknown action'];
    }
    header('Content-Type: application/json; charset=utf-8');
    echo json_encode($result);
    exit;
});